Final Salutes for Bush in DC, Texas

People pay their respects as the train carrying the casket of former President George H.W. Bush passes, Dec. 6, 2018, along the route from Spring to College Station, Texas.

People pay their respects as the hearse carrying the casket of former President George H.W. Bush arrives on the Texas A&M campus, Dec. 6, 2018, in College Station, Texas.

Firefighters stand on their truck and salute along with other attendants on an overpass as the train carrying the body of former president George H.W. Bush travels past on the way to Bush's final internment Thursday, Dec. 6, 2018, in Spring, Texas.

People pay their respects as the flag-draped casket of former President George H.W. Bush lies in repose at St. Martin's Episcopal Church in Houston, Dec. 5, 2018.

Reba McEntire sings 'The Lord's Prayer' during a funeral service for former President George H.W. Bush at St. Martin's Episcopal Church in Houston, Dec. 6, 2018.

The flag-draped casket of former President George H.W. Bush passes through Magnolia, Texas, along the route from Spring to College Station, Texas, Dec. 6, 2018.

The casket of President George H. W. Bush arrives by train to Texas A&M University for burial at the George Bush Presidential Library in College Station, Dec. 6, 2018.

The flag-draped casket of former President George H.W. Bush is carried by a joint services military honor guard followed by family members at the George H.W. Bush Presidential Library and Museum, Dec. 6, 2018, in College Station, Texas.

The Honor Guard carries the casket of former president George Herbert Walker Bush down the center isle following a memorial ceremony at the National Cathedral in Washington, Dec. 5, 2018.

President George W. Bush, his wife Laura Bush and brother Jeb Bush watch as the casket of former President George H.W. Bush arrives at the National Cathedral, Dec. 5, 2018, in Washington, for a State Funeral.

(L-R) President Donald Trump, first lady Melania Trump, former President Barack Obama, Michelle Obama, former President Bill Clinton and former Secretary of State Hillary Clinton listen during a State Funeral for former President George H.W. Bush at the National Cathedral in Washington, Dec. 5, 2018.

The flag-draped casket of former President George H.W. Bush lies in state in the Capitol Rotunda in Washington, Monday, Dec. 3, 2018. (Jonathan Ernst/Pool via AP)

The funeral procession carrying the body of former U.S. President George H. W. Bush passes down Pennsylvania Avenue in Washington, Dec. 5, 2018.

Former Sen. Bob Dole salutes the flag-draped casket containing the remains of former President George H.W. Bush as he lies in state at the U.S. Capitol in Washington, Dec. 4, 2018.

Sully, the service dog of former U.S. President George H.W. Bush in his final months, lays in front of Bush's casket at the George H. Lewis & Sons funeral home in Houston, Texas, U.S., Dec. 3, 2018.